Jason Farrignton Vaughan is one of four Shreveport firefighters arrested in the past two weeks. / Caddo Correctional Center

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A fourth Shreveport firefighter is behind bars as part of an ongoing investigation into alleged criminal activity at a local fire station.

Jason Vaughan, 34, surrendered to Caddo Correctional Center today on a warrant charging him with one count each of cruelty to the infirm and principal to prostitution, said Cindy Chadwick, spokeswoman for Caddo sheriff. The investigation continues at this hour and authorities say additional arrests may be forthcoming.